KR102363290B1 - Optical touch film, display devcie including the same, and manufacturing method thereof - Google Patents

Abstract

The present disclosure relates to an optical touch film, a display device including the same, and a method for manufacturing the same, and the optical touch film according to an embodiment includes a sensor layer including a plurality of touch electrodes constituting a sensor, an optical film, the sensor layer and the A curable adhesive layer located between the optical films, a separation layer located on one surface of the sensor layer and including a polymer organic material, and a layer in contact with the plurality of touch electrodes, having a refractive index higher than the refractive index of the separation layer It includes a high refractive insulating film.

Description

Optical touch film, display device including same, and manufacturing method thereof

The present disclosure relates to an optical touch film, a display device including the same, and a method of manufacturing the same.

A display device such as a liquid crystal display (LCD) or an organic light emitting diode display (OLED display) includes a pixel electrode and an electro-optical active layer. For example, an organic light emitting display device includes an organic light emitting layer as an electro-optical active layer, and a liquid crystal display device includes a liquid crystal layer as an electro-optically active layer. The pixel electrode may be connected to a switching device such as a thin film transistor to receive a data signal, and the electro-optical active layer converts the data signal into an optical signal to display an image.

The display device may include a sensing function capable of interacting with a user in addition to a function of displaying an image. The sensing function is, for example, by sensing a change in pressure, electric charge, light, etc. applied to the screen by the display device when the user approaches or touches a finger or a touch pen on the screen to write text or draw a picture. It is a function to find out contact information such as whether an object has approached or touched the screen and the location of the contact. The display device may receive an image signal and display an image based on the contact information.

The sensing function may be implemented through a sensor. The sensor may be classified according to various methods such as a resistive type, a capacitive type, an electromagnetic induction type (EM), and an optical type. The double capacitive sensor includes a plurality of touch electrodes capable of transmitting a detection signal. A touch electrode may form a sensing capacitor alone or with an adjacent touch electrode. When a conductor, such as a finger, approaches or touches the sensor, a change in capacitance or charge amount of the sensing capacitor occurs, and through this, it is possible to find out whether or not there is a contact and the location of the contact.

The plurality of touch electrodes may be disposed in a touch sensing region in which a touch may be sensed, and may be connected to a plurality of signal transmission lines that transmit a sensing signal.

The sensor may be embedded in the display device (in-cell type), directly formed on the outer surface of the display device (on-cell type), or a separate touch sensor unit may be attached to the display device (add-on cell type) to be used. there is. In particular, in the case of a flexible display device, a method of forming a film on which a sensor is formed and then attaching it on a display panel (add-on cell type) is mainly used.

The present exemplary embodiments are for reducing the thickness of a display device having a sensing function, reducing manufacturing cost, and improving optical characteristics of the display device.

The optical touch film according to an embodiment includes a sensor layer including a plurality of touch electrodes constituting the sensor, an optical film, a curable adhesive layer positioned between the sensor layer and the optical film, and a polymer organic material positioned on one surface of the sensor layer and a high refractive insulating layer positioned on a layer in contact with the plurality of touch electrodes and having a refractive index higher than that of the separation layer.

A display device according to an embodiment includes a display panel and an optical touch film, wherein the optical touch film is positioned between a sensor layer including a plurality of touch electrodes constituting a sensor, an optical film, and the sensor layer and the optical film A curable adhesive layer that is positioned on one surface of the sensor layer and includes a separation layer containing a polymer organic material, and a high refractive insulating film located in a layer in contact with the plurality of touch electrodes and having a refractive index higher than the refractive index of the separation layer .

The high refractive insulating layer may be included in the sensor layer.

The sensor layer further includes a connection part that connects two adjacent touch electrodes among the plurality of touch electrodes and is positioned on a different layer from the plurality of touch electrodes, and the high refractive insulating layer is located between the plurality of touch electrodes and the connection part can do.

The high refractive insulating layer may be positioned between the plurality of touch electrodes and the curable adhesive layer.

The separation layer may be positioned between the high refractive insulating layer and the curable adhesive layer.

The sensor layer further includes a connection part connecting two adjacent touch electrodes among the plurality of touch electrodes and positioned on a different layer from the plurality of touch electrodes, and a first insulating layer positioned between the plurality of touch electrodes and the connection part. and the plurality of touch electrodes may be positioned in a layer between the high refractive insulating layer and the first insulating layer.

The connection part may be in contact with the separation layer.

The separation layer may be positioned between the curable adhesive layer and the connection part.

A second insulating layer may be further included in contact with the high refractive insulating layer, and the high refractive insulating layer may be positioned in a layer between the second insulating layer and the plurality of touch electrodes.

The high refractive insulating layer may include an organic material.

The high refractive insulating layer may further include nanoparticles.

The separation layer may be adjacent to and in contact with the curable adhesive layer.

A refractive index of the high refractive insulating layer may be closer to a refractive index of the plurality of touch electrodes than a refractive index of the separation layer.

The refractive index of the high refractive insulating layer may be 1.6 or more and 2.0 or less.

A method of manufacturing a display device according to an exemplary embodiment includes coating a separation layer including a polymer organic material on a carrier substrate, a plurality of touch electrodes on the separation layer, and a plurality of touch electrodes in contact with the plurality of touch electrodes and having a refractive index higher than the refractive index of the separation layer Forming a sensor layer including a high refractive insulating film having a high refractive index, separating the sensor layer and the separation layer together from the carrier substrate, and placing an adhesive layer between the sensor layer and the optical film and curing the adhesive layer including the step of making

The high refractive insulating layer may be positioned between the plurality of touch electrodes and the adhesive layer.

The separation layer may be adjacent to and in contact with the adhesive layer.

According to the present exemplary embodiments, a thickness of a display device having a sensing function may be reduced, a manufacturing cost may be reduced, and optical characteristics of the display device may be improved, such as improving transmittance of the display device and minimizing color change.

1 is a schematic cross-sectional view of a display device according to an exemplary embodiment;
2 is a schematic plan view of a display panel included in a display device according to an exemplary embodiment;
3 is a plan view of an optical touch film included in a display device according to an exemplary embodiment;
Figure 4 is an enlarged view of a part of the optical touch film shown in Figure 3,
5 is a cross-sectional view showing the optical touch film shown in FIG. 4 taken along line IV-IV,
6 and 7 are cross-sectional views of an intermediate product at an intermediate stage of a process according to a method for manufacturing an optical touch film according to an embodiment, respectively;
8 to 31 are cross-sectional views of a display device including an optical touch film according to an exemplary embodiment.

Hereinafter, with reference to the accompanying drawings, various embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in several different forms and is not limited to the embodiments described herein.

In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

In addition, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar. In order to clearly express various layers and regions in the drawings, the thicknesses are enlarged. And in the drawings, for convenience of description, the thickness of some layers and regions are exaggerated.

Further, when a part of a layer, film, region, plate, etc. is said to be “on” or “on” another part, it includes not only cases where it is “directly on” another part, but also cases where another part is in between. . Conversely, when we say that a part is "just above" another part, we mean that there is no other part in the middle. In addition, to be "on" or "on" the reference part is located above or below the reference part, and does not necessarily mean to be located "on" or "on" the opposite direction of gravity. .

In addition, throughout the specification, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

In addition, throughout the specification, when referring to "planar", it means when the target part is viewed from above, and "cross-sectional" means when viewed from the side when a cross-section of the target part is vertically cut.

A display device according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 5 .

1 is a schematic cross-sectional view of a display device according to an exemplary embodiment, FIG. 2 is a schematic plan view of a display panel included in the display device according to an exemplary embodiment, and FIG. It is a plan view of the optical touch film, FIG. 4 is an enlarged view of a part of the optical touch film shown in FIG. 3 , and FIG. 5 is a cross-sectional view illustrating the optical touch film shown in FIG. 4 taken along line IV-IV.

The display device 1 according to an embodiment of the present invention is a display device having a sensing function, and may be, for example, a display device having a function of sensing an external touch.

The display device 1 includes a display panel 300 capable of displaying an image, an optical touch film 600 , and a controller 700 .

The display panel 300 and the optical touch film 600 may have a main surface extending in a plane parallel to the first direction Dr1 and the second direction Dr2, respectively, and may have a main surface extending in the first direction ( When viewed from Dr1) and the third direction Dr3 perpendicular to the second direction Dr2, main surfaces of the display panel 300 and the optical touch film 600 may be observed.

At least a portion of the display panel 300 and the optical touch film 600 is flexible and may be bent, folded, rolled, or the like.

Referring to FIG. 1 , the display panel 300 and the optical touch film 600 may be disposed adjacent to each other in a direction parallel to the third direction Dr3 . The optical touch film 600 may be attached on the display panel 300 in the third direction Dr3 .

Referring to FIG. 2 , the display panel 300 includes a display area DA in which a plurality of pixels PX, each of which is a unit for displaying an image, are located. The display panel 300 may include display elements having various structures, such as a liquid crystal display panel including a liquid crystal layer and an organic light emitting display panel including an organic light emitting element.

Referring to FIG. 5 , the optical touch film 600 may include an optical film 550 , a sensor layer 400 , an adhesive layer 10 , and a separation layer 120a when viewed in cross-sectional view. The adhesive layer 10 may be positioned between the optical film 550 and the sensor layer 400 , and the separation layer 120a may be positioned on either side of the sensor layer 400 . 5 shows an example in which the adhesive layer 10 and the separation layer 120a are in contact with each other. In the present embodiment, the optical film 550 may be positioned between the sensor layer 400 and the display panel 300 , but is not limited thereto. That is, the sensor layer 400 may be positioned between the display panel 300 and the optical film 550 .

A specific structure of the sensor layer 400 will be described in detail with reference to FIGS. 3 to 5 .

Referring to FIG. 3 , the sensor layer 400 of the optical touch film 600 according to an embodiment may include a touch area TA and a peripheral area PA when viewed in a plan view. can

The touch area TA is an area capable of sensing a touch of an external object, and may overlap and correspond to the display area DA of the display panel 300 . Here, the touch of an external object includes not only a case in which an external object such as a user's hand directly touches the touch area TA, but also a case in which the external object approaches or hovers while approaching the display device 1 .

A sensor capable of detecting a touch is positioned in the touch area TA. The sensor may detect a contact in various ways, for example, a resistive type, a capacitive type, an electromagnetic induction type (EM), an optical type ) may be a sensor of various types. In the following description, a structure of a capacitive sensor, particularly a sensor of a mutual sensing capacitive type, will be described as an example.

Referring to FIG. 3 , a sensor according to an embodiment may include a plurality of touch electrodes. In the case of the mutual sensing capacitive sensor, the plurality of touch electrodes may include a plurality of first touch electrodes 410 and a plurality of second touch electrodes 420 separated from each other.

The plurality of first touch electrodes 410 and the plurality of second touch electrodes 420 are alternately distributed so as not to overlap each other in the touch area TA. The plurality of first touch electrodes 410 may be disposed along the column direction and the row direction, and the plurality of second touch electrodes 420 may also be disposed along the column direction and the row direction.

The first touch electrode 410 and the second touch electrode 420 may be positioned on the same layer.

The plurality of first touch electrodes 410 arranged in the same row or column may be connected to or separated from each other inside or outside the touch area TA. Similarly, at least a portion of the plurality of second touch electrodes 420 arranged in the same column or row may be connected to each other or separated from each other inside or outside the touch area TA. For example, as shown in FIG. 3 , a plurality of first touch electrodes 410 disposed in the same row are connected to each other in the touch area TA, and a plurality of second touch electrodes 420 disposed in the same column. ) may be connected to each other in the touch area TA.

Specifically, the plurality of first touch electrodes 410 positioned in each row are connected to each other through a first connection part 412 , and the plurality of second touch electrodes 420 positioned in each column are connected to the second connection part 422 . ) may be connected to each other.

3 to 5 , the second connection part 422 connecting the second touch electrodes 420 adjacent to each other is located on the same layer as the second touch electrode 420 and is connected to the second touch electrode 420 and the second touch electrode 420 . It may contain the same material. That is, the second touch electrode 420 and the second connection part 422 may be integrated with each other and may be simultaneously patterned in the manufacturing process.

The first connection part 412 connecting the first touch electrodes 410 adjacent to each other may be located on a different layer from the first touch electrode 410 . That is, the first touch electrode 410 and the first connection part 412 may be separately formed in different processes.

According to another embodiment, the first connection part 412 is located on the same layer as the first touch electrode 410 and is integrated with the first touch electrode 410 , and the second connection part 422 is the second touch electrode ( 420) and may be located on a different floor.

A first insulating layer 430 is positioned between the first connection part 412 and the second connection part 422 to insulate the first connection part 412 and the second connection part 422 from each other. The first insulating layer 430 may include a contact hole 435 exposing each of the adjacent first touch electrodes 410 so that the first connection part 412 can be connected to the first touch electrode 410 .

Referring to FIG. 3 , the first touch electrodes 410 in each row may be connected to the pad parts 450 in the peripheral area PA through the first touch wires 411 , and the second touch electrodes 420 in each column. ) may be connected to the pad part 450 of the peripheral area PA through the second touch wire 421 . Unlike the drawings, at least a portion of the first touch wire 411 and the second touch wire 421 may be located in the touch area TA.

The first touch electrode 410 and the second touch electrode 420 may have a transmittance greater than or equal to a predetermined transmittance to allow light to pass therethrough. For example, the first touch electrode 410 and the second touch electrode 420 may include a thin metal layer such as indium tin oxide (ITO), indium zinc oxide (IZO), or silver nanowire (AgNW), or a metal mesh. ), carbon nanotubes (CNT), and a transparent conductive material such as a conductive polymer.

The first touch wire 411 and the second touch wire 421 may include a transparent conductive material included in the first touch electrode 410 and the second touch electrode 420 , and may include molybdenum (Mo), silver ( Ag), titanium (Ti), copper (Cu), aluminum (Ti), and may further include a low-resistance material such as molybdenum/aluminum/molybdenum (Mo/Al/Mo). FIG. 5 shows a first touch wire 411 or a second touch wire 421 including a first conductive layer 411a and a second conductive layer 411b stacked in a direction parallel to the third direction Dr3. An example is shown. The first conductive layer 411a may be disposed on the same layer as the first touch electrode 410 and may include the same material as the first touch electrode 410 , and the second conductive layer 411b may include the first conductive layer ( 411a) and may include a low-resistance material such as a metal.

The first and second touch electrodes 410 and 420 adjacent to each other form a mutual sensing capacitor functioning as a sensor. The mutual sensing capacitor receives a sensing input signal through one of the first touch electrode 410 and the second touch electrode 420 and outputs a change in the amount of charge due to the contact of an external object as a sensing output signal through the remaining touch electrodes. there is.

3 and 4 , the plurality of first touch electrodes 410 and the plurality of second touch electrodes 420 may be respectively connected to touch wires (not shown). In this case, each touch electrode may form a self sensing capacitance as a sensor. The self-sensing capacitor may receive a sensing input signal and be charged with a predetermined amount of charge, and when an external object such as a finger comes into contact with the self-sensing capacitor, the amount of charge may be changed and output a sensing output signal different from the input sensing input signal.

Referring to FIG. 5 , the sensor layer 400 may further include a second insulating layer 440 positioned on the first connection part 412 .

The principal surface of the sensor layer 400 includes a first surface SA1 and a second surface SA2. The first surface SA1 and the second surface SA2 form opposite surfaces of the sensor layer 400 . Among the first and second surfaces SA1 and SA2 , the first and second touch electrodes 410 and 420 and the first and second touch electrodes 410 and 420 of the first connector 412 are closer to each other. The surface is referred to as a first surface SA1, and the opposite surface is referred to as a second surface SA2. In FIG. 5 , the positions of the first surface SA1 and the second surface SA2 may be changed. That is, the second surface SA2 may be located closer to the display panel 300 than the first surface SA1 .

Referring to FIG. 5 , the optical film 550 may be positioned between the sensor layer 400 and the display panel 300 , and the adhesive layer 10 may be positioned between the sensor layer 400 and the optical film 550 . The adhesive layer 10 may be in contact with the surface of the optical film 550 .

The adhesive layer 10 includes a polymer organic material, and unlike an adhesive, it may be a thermosetting type or a UV curing type.

The separation layer 120a may be positioned between the adhesive layer 10 and the sensor layer 400 or on the second surface SA2 of the sensor layer 400 . 5 shows an example in which the separation layer 120a is positioned between the sensor layer 400 and the adhesive layer 10 . In this case, the adhesive layer 10 may be adjacent to and in contact with the separation layer 120a. The adhesive layer 10 may be positioned between the separation layer 120a and the optical film 550 to bond the separation layer 120a and the optical film 550 to each other.

The separation layer 120a may include a polymer organic material. For example, the separation layer 120a may include polyimide, polyvinyl alcohol, polyamic acid, polyamide, polyethylene, polystylene, and poly Norbornene, phenylmaleimide copolymer, polyazobenzene, polyphenylenephthalamide, polyester, polymethyl methacrylate, polyarylate (polyarylate), cinnamate-based polymers, coumarin-based polymers, phthalimidine-based polymers, chalcone-based polymers, and aromatic acetylene-based polymers include at least one material selected from the group consisting of materials can do. The separation layer 120a may further include an inorganic material in addition to the organic polymer material.

The separation layer 120a may have greater adhesion to the first and second touch electrodes 410 and 420 than to the glass.

The thickness of the separation layer 120a in the third direction Dr3 may be approximately 1 micrometer to 100 micrometers, but is not limited thereto.

5 , the optical film may be positioned on the second surface SA2 of the sensor layer 400 , and the adhesive layer 10 may be positioned between the second surface SA2 and the optical film.

The optical film 550 may include at least one of a transparent film and a polarizing film. The transparent film may be an isotropic film. The polarizing film is a film for improving optical properties and may include at least one polarizing layer and at least one retardation layer. The polarizing layer may include polyvinyl alcohol (PVA) and may further include at least one supporter. The polarizing film may be a circularly polarizing film, and in this case, the polarizing film may include a linear polarizing layer and a quarter wave retardation layer.

When the optical film 550 is a polarizing film, a retardation layer included in the polarizing film may be positioned between the polarizing layer and the display panel 300 . That is, the polarization layer may be positioned between the phase delay layer and the sensor layer 400 .

The optical film 550 may function to prevent external light reflected from an electrode or wiring included in the display panel 300 and the sensor layer 400 from being viewed. That is, the light that is incident into the display device 1 from the outside, passes through the optical film 550 , is reflected from an electrode or wiring below it, and is incident on the optical film 550 again is incident on the optical film 550 from the outside. It may not be visually recognized from the outside by causing destructive interference with light.

In the manufacturing process of the optical touch film 600 according to an embodiment, after forming a separation layer on a separate carrier substrate, the sensor layer 400 is formed thereon, and the sensor layer 400 together with the separation layer is carried as a carrier After peeling from the substrate, the peeled sensor layer 400 and the separation layer are attached to one surface of the optical film 550 using an adhesive layer 10 to be integrated. Therefore, the optical film 550 is not damaged by the process for forming the sensor layer 400 .

In addition, the optical film 550 and the sensor layer 400 may have high adhesion and fixing force. Accordingly, even when the display device 1 is flexible, the optical film 550 and the sensor layer 400 are not separated, so that a defect does not occur.

In addition, according to the prior art, a film having a sensing function and an optical film are respectively formed and attached to the display panel, but according to the embodiment of the present invention, the sensor layer 400 is attached on the optical film 550 through the adhesive layer 10 . Since they are integrated, one optical touch film 600 that improves optical properties while having a sensing function can replace two or more conventional films. Accordingly, the overall thickness of the display device 1 may be reduced, and in the case of the flexible display device, stress upon deformation may be reduced.

In addition, since the optical touch film 600 having a plurality of functions, such as a sensing function and an optical characteristic improvement function, includes only one film, a film price may be reduced, and a manufacturing cost of a display device may be reduced. In addition, since the number of films positioned on the display panel 300 can be minimized, transmittance of an image displayed by the display panel 300 can be increased and color change can be minimized.

Referring back to FIG. 1 , the controller 700 may control operations of the display panel 300 and the optical touch film 600 . Specifically, the controller 700 may receive an input image signal from the outside and apply the signal to the display panel 300 based on the received image signal. The controller 700 may be connected to the sensor of the optical touch film 600 to control the operation of the sensor. That is, the controller 700 may transmit a detection input signal to the sensor or receive and process a detection output signal to generate contact information such as whether or not there is a contact and a contact location.

The control unit 700 is mounted directly on the display panel 300 or the optical touch film 600 in the form of at least one integrated circuit chip, or is mounted on a flexible printed circuit film to be mounted on a tape carrier package (TCP). ) may be attached to the display panel 300 or the optical touch film 600 or mounted on a separate printed circuit board (not shown).

Now, a method of manufacturing a display device according to an exemplary embodiment will be described with reference to FIGS. 6 and 7 along with the drawings described above.

6 and 7 are cross-sectional views of an intermediate product at an intermediate stage of a process according to a method for manufacturing an optical touch film according to an embodiment, respectively.

First, referring to FIG. 6 , the separation layer 120 is formed by coating a polymer organic material on the carrier substrate 110 . The carrier substrate 110 may include glass.

Next, first and second touch electrodes 410 and 420 , first and second touch wires 411 and 421 , and a first connection part 412 are formed on the separation layer 120 . Specifically, a first conductive layer (not shown) including a transparent conductive material such as ITO and IZO and a second conductive layer (not shown) including a low resistance material such as metal are sequentially formed on the separation layer 120 . It is laminated and then patterned. Next, the first and second touch wires including the first conductive layer 411a and the second conductive layer 411b by removing the second conductive layer in portions except for the first and second touch wires 411 and 421 . 411 and 421 are formed, and a plurality of first touch electrodes 410 , a plurality of second touch electrodes 420 , and a plurality of second connection units 422 are formed. Next, an insulating material is laminated and patterned on the first touch electrode 410 , the second touch electrode 420 , the second connection part 422 , and the first and second touch wires 411 and 421 to form a contact hole 435 . A first insulating film 430 including Next, a conductive material is stacked on the first insulating layer 430 and patterned to form a first connection part 412 . Next, an insulating material may be stacked on the first connection part 412 and the first insulating layer 430 to form a second insulating layer 440 .

Unlike shown in FIG. 6 , the upper and lower stacking positions of the first and second touch electrodes 410 and 420 and the first connector 412 may be changed.

Next, referring to FIG. 7 , after the sensor layer 400 is formed, the separation layer 120 is separated from the carrier substrate 110 by peeling the separation layer 120 together with the sensor layer 400 . As a peeling method, a roll to roll peeling method can be used.

The separation layer 120a may be positioned under the first surface SA1 of the peeled sensor layer 400 . The separation layer 120a may substantially include most of the separation layer 120 before peeling. Accordingly, the thickness of the separation layer 120a in the third direction Dr3 may be substantially the same as or slightly smaller than the thickness of the separation layer 120 in the third direction Dr3 before peeling.

5, the adhesive layer 10 is formed by applying an adhesive material on the lower surface of the separation layer 120a located below the peeled sensor layer 400 or the upper surface of the sensor layer 400, and , after attaching the optical film 550 and the sensor layer 400 with the adhesive layer 10 interposed therebetween, thermal curing or UV curing of the adhesive layer 10 to integrate the sensor layer 400 and the optical film 550 . Accordingly, the optical touch film 600 according to an embodiment can be completed.

According to the method of manufacturing a display device according to an embodiment of the present invention, since the sensor layer 400 is formed on a separate carrier substrate 110 and then separated and attached to the optical film 550 , the optical film 550 is the sensor layer. It may not be damaged by heat during the manufacturing process of 400 , and the optical film 550 and the sensor layer 400 may have high adhesion. In addition, since the optical touch film 600 having a plurality of functions such as a sensing function and an optical property improvement function includes only one film, it is possible to reduce the film price to reduce the manufacturing cost of the display device, and to reduce the thickness of the display device there is.

Then, an optical touch film included in the display device according to an embodiment of the present invention will be described with reference to FIGS. 8 to 14 together with the previously described drawings, respectively.

8 to 14 are cross-sectional views of an optical touch film included in a display device according to an exemplary embodiment, respectively.

First, referring to FIG. 8 , the optical touch film 600a included in the display device according to the present embodiment is mostly the same as the optical touch film 600 of the aforementioned embodiment, but the optical film 500 and the display panel 300 . The sensor layer 400 may be positioned therebetween. The optical film 500 is mostly the same as the optical film 550 described above. When the optical film 500 is a polarizing film, the retardation layer included in the optical film 500 may be positioned between the polarizing layer and the sensor layer 400 . The optical film 500 may be positioned on the first surface SA1 of the sensor layer 400 , and the adhesive layer 10 and the separation layer 120a may be positioned between the first surface SA1 and the optical film 500 . .

According to the present embodiment, since the optical film 500 is positioned above the sensor layer 400 , it is effective to visually recognize external light reflected from the electrode or wiring included in the sensor layer 400 by the optical film 500 . can be prevented

Next, referring to FIG. 9 , the optical touch film 600b included in the display device according to the present embodiment is mostly the same as the optical touch film 600a according to the embodiment illustrated in FIG. 8 described above, but the sensor layer 400 ) may have different vertical directions. That is, the display panel 300 may be positioned under the first surface SA1 of the sensor layer 400 , and the optical film 500 may be positioned on the second surface SA2 . In addition, the separation layer 120a may be positioned between the display panel 300 and the sensor layer 400 without contacting the adhesive layer 10 .

Next, referring to FIG. 10 , the optical touch film 600c included in the display device according to the present embodiment is mostly the same as the optical touch film 600a according to the embodiment illustrated in FIG. 8 described above, but the sensor layer 400 ) may have different structures. Specifically, the first connection part 412 is located under the separation layer 120a, the first insulating film 430 having the contact hole 435 is located under the first connection part 412 , and the first insulating film 430 is located below the first connection part 412 . The first and second touch electrodes 410 and 420 and the first and second touch wirings 411 and 421 may be positioned on the surface, and a second insulating layer 440 may be positioned thereunder. Also in this case, the main surface of the sensor layer 400 closer to the first and second touch electrodes 410 and 420 than the first connection part 412 is referred to as a first surface SA1, and the opposite surface to the second surface is referred to as a second surface. It is called (SA2).

Next, referring to FIGS. 11 to 31 , the optical touch film included in the display device according to the present embodiment is mostly the same as the optical touch films 600 , 600a , 600b , and 600c according to various embodiments described above, but the sensor layer At least one high refractive insulating layer included in the sensor layer 400 or positioned around the sensor layer 400 may be included. In particular, the high refractive insulating layer may be located in a layer adjacent to and in contact with the first touch electrode 410 and the second touch electrode 420 constituting the sensor. 11 illustrates an example in which the high refractive insulating layer 450M is positioned in a layer between the first and second touch electrodes 410 and 420 and the separation layer 120a.

The high refractive insulating film 450M may be a refractive index matching layer for reducing total reflection by alleviating the refraction of light on the surfaces of the first and second touch electrodes 410 and 420 and for alleviating the pattern penetration and transmittance reduction of the sensor layer 400 there is. Accordingly, the refractive index of the high refractive insulating layer 450M may have a high refractive index close to the refractive indices of the first and second touch electrodes 410 and 420 . The refractive index of the high refractive insulating layer 450M may be greater than about 1.5, and more specifically, from about 1.6 to about 2.0. That is, the refractive index of the high refractive insulating film 450M is the first and second touch electrodes 410 and 420 among the layers constituting the optical touch film 600d, and the insulating layer ( For example, it has the highest refractive index among the separation layer 120a or the second insulating layer 440 , and first and second among the insulating layers (eg, the separation layer 120a or the second insulating layer 440 ). It may have the closest refractive index to the touch electrodes 410 and 420 .

When the first touch electrode 410 and the second touch electrode 420 are made of ITO, since ITO has a refractive index of approximately 1.7 to 1.9, the first touch electrode 410 and the second touch electrode ( When the high refractive insulating film 450M similar to the refractive index of 420 is positioned in contact with the first touch electrode 410 and the second touch electrode 420, total reflection can be reduced and the pattern reflection and transmittance reduction of the sensor layer 400 can be alleviated. . The refractive index of the separation layer 120a may be lower than that of the high refractive insulating layer 450M, for example, about 1.5 or less. Similarly, the refractive index of the second insulating layer 440 may be lower than that of the high refractive insulating layer 450M, for example, about 1.5 or less.

Additionally, the high refractive insulating layer 450M positioned in contact with the first touch electrode 410 and the second touch electrode 420 increases the film quality of the first touch electrode 410 and the second touch electrode 420 to make the first touch It is possible to prevent defects such as cracks from occurring in the layers of the electrode 410 and the second touch electrode 420 . In particular, when attached to a flexible display device, the optical touch film 600d is also bent or bent. In this case, cracks are highly likely to occur in the first touch electrode 410 and the second touch electrode 420 formed of ITO or the like. , the high refractive insulating layer 450M in contact with the first touch electrode 410 and the second touch electrode 420 is positioned, thereby preventing the occurrence of defects such as cracks.

The high refractive insulating layer 450M may be a coating type insulating layer formed by a coating method, may include an organic material (eg, a polymer organic material), and may further include nanoparticles. The nanoparticles may include a material such as zirconium oxide (ZrO2) or silicon oxide (SiO2). According to another embodiment, the high refractive insulating layer 450M may include various high refractive index polymers (HIRP) or an inorganic thin film. The high refractive index insulating layer 450M may be formed through a coating method in the process of forming the sensor layer 400 .

The thickness of the high refractive insulating layer 450M in the third direction Dr3 may be several nanometers to several micrometers, for example, about 1 nanometer to about 10 micrometers. However, the thickness of the high refractive insulating layer 450M may vary depending on the thickness and characteristics of the layers constituting the first touch electrode 410 and the second touch electrode 420 .

In this embodiment, the separation layer 120a, the optical film 550, and the display panel 300 may be sequentially positioned on the first surface SA1 side of the sensor layer 400 . The optical film 550 may be an isotropic film. An adhesive layer 5 may be positioned between the display panel 300 and the optical film 550 . The adhesive layer 5 may include, for example, a pressure sensitive adhesive (PSA) material, and may be separated according to conditions after adhesion. An optical film 500 may be attached on the sensor layer 400 through an adhesive layer 15 . The adhesive layer 15 may have the same properties as the adhesive layer 5 . The optical film 500 may be a polarizing film.

Next, referring to FIG. 12 , the optical touch film 600e of this embodiment is mostly the same as the optical touch film 600d according to the embodiment of FIG. 11 described above, but instead of the high refractive insulating film 450M, the high refractive insulating film 430M is used. It may be positioned between the first and second touch electrodes 410 and 420 and the first connection part 412 . In this case, part or all of the first insulating layer 430 may be omitted, and the high refractive insulating layer 430M may be positioned there. The characteristics and effects of the high refractive insulating layer 430M are the same as those of the high refractive insulating layer 450M described above.

Next, referring to FIG. 13, the optical touch film 600f of this embodiment is mostly the same as the optical touch film 600d according to the embodiment of FIG. 11 described above, but instead of the high refractive insulating film 450M, the high refractive insulating film 440M is used. 1 may be located on a layer above the connection unit 412 . In this case, part or all of the second insulating layer 440 may be omitted, and the high refractive insulating layer 440M may be positioned there. The characteristics and effects of the high refractive insulating layer 440M are the same as those of the high refractive insulating layer 450M described above.

Next, referring to FIG. 14 , the optical touch film 600g included in the display device according to the present embodiment is mostly the same as the optical touch film 600d according to the embodiment of FIG. 11 described above, but the sensor layer 400 and The optical film 550 and the adhesive layer 5 between the display panel 300 may be omitted.

Next, referring to FIG. 15 , the optical touch film 600h included in the display device according to the present embodiment is mostly the same as the optical touch film 600e according to the embodiment of FIG. 12 described above, but the sensor layer 400 and The optical film 550 and the adhesive layer 5 between the display panel 300 may be omitted.

Next, referring to FIG. 16 , the optical touch film 600i included in the display device according to this embodiment is mostly the same as the optical touch film 600f according to the embodiment of FIG. 13 described above, but the sensor layer 400 and The optical film 550 and the adhesive layer 5 between the display panel 300 may be omitted.

Next, referring to FIG. 17 , the optical touch film 600j included in the display device according to the present embodiment is mostly the same as the optical touch film 600h according to the embodiment of FIG. 15 described above, but the optical film 500 and A curable adhesive layer 10 including a polymer organic material may be positioned between the sensor layers 400 , and an adhesive layer 20 may be positioned between the separation layer 120a and the display panel 300 . The adhesive layer 20 may have the same properties as the adhesive layer 5 described above.

Next, referring to FIG. 18, the optical touch film 600k of this embodiment is mostly the same as the optical touch film 600e according to the embodiment shown in FIG. 12 described above, but the sensor layer 400 is shown in FIG. It may have the same structure as the illustrated sensor layer 400 . That is, the upper and lower positions of the first surface SA1 and the second surface SA2 may be changed. Specifically, the first connection part 412 and the first and second touch wires 411 and 421 are positioned on the separation layer 120a, and the first and second touch electrodes 410 and 420 are positioned thereon, and thereon A second insulating layer 440 may be positioned. The first and second touch wirings 411 and 421 may include a first conductive layer 411a and a second conductive layer 411b , and the first conductive layer 411a is the same as the first connection part 412 . The layer may include the same material, and the second conductive layer 411b may be disposed on the first conductive layer 411a and include a low-resistance material such as a metal.

This embodiment shows an example in which the high refractive insulating layer 430M is positioned between the first connection part 412 and the second connection part 422 as an example including at least one high refractive index insulating layer. The high refractive insulating layer 430M is positioned on a layer in contact with the first touch electrode 410 and the second touch electrode 420 . The high refractive insulating layer 430M may have a contact hole 435M positioned on the first connection part 412 . In addition, the characteristics and effects thereof of the high refractive insulating film 430M are mostly the same as those of the various high refractive insulating films described above, and thus a detailed description thereof will be omitted.

Next, referring to FIG. 19 , the optical touch film 600l of this embodiment is mostly the same as the optical touch film 600k according to the embodiment of FIG. 18 described above, but instead of the high refractive insulating film 430M, first and second touch electrodes A high refractive insulating layer 440M may be positioned between the 410 and 420 and the optical film 500 . The high refractive insulating layer 440M is positioned on a layer in contact with the first and second touch electrodes 410 and 420 . In this case, all or part of the second insulating layer 440 may be omitted, and the high refractive insulating layer 440M may be positioned there.

Next, referring to FIG. 20 , the optical touch film 600m included in the display device according to the present embodiment is mostly the same as the optical touch film 600l according to the embodiment of FIG. 19 described above, but the first connection part 412 . A first insulating layer 430 and a high refractive insulating layer 433M may be positioned between the and the second connection part 422 . The high refractive insulating layer 433M is positioned on a layer in contact with the first touch electrode 410 and the second touch electrode 420 . That is, the high refractive insulating layer 433M, the first insulating layer 430 , and the first connection part 412 may be sequentially positioned under the first touch electrode 410 and the second touch electrode 420 . Also, the optical film 550 may be positioned between the separation layer 120a and the display panel 300 , and the adhesive layer 10 may be positioned between the optical film 550 and the separation layer 120a. The adhesive layer 20 may be positioned between the optical film 550 and the display panel 300 . The optical film 550 may be an isotropic film.

The optical film 550 and the adhesive layer 5 between the sensor layer 400 and the display panel 300 may be omitted.

Next, referring to FIG. 21 , the optical touch film 600n of this embodiment is mostly the same as the optical touch film according to the various embodiments described above, but the sensor layer 400 is positioned on the display panel 300 , and a separation layer thereon The 120a is positioned, and the optical film 500 may be positioned thereon. The optical film 500 may be a polarizing film, and the adhesive layer 10 may be positioned between the optical film 500 and the separation layer 120a. An adhesive layer 20 may be positioned between the sensor layer 400 and the display panel 300 . Also, a high refractive insulating layer 450M may be positioned between the first and second touch electrodes 410 and 420 and the adhesive layer 10 .

Next, referring to FIG. 22 , the optical touch film 600o included in the display device according to the present embodiment is mostly the same as the optical touch film 600n according to the embodiment of FIG. 21 described above, but instead of the high refractive insulating film 450M A high refractive insulating layer 430M may be positioned between the first and second touch electrodes 410 and 420 and the first connection part 412 . In this case, part or all of the first insulating layer 430 may be omitted, and the high refractive insulating layer 430M may be positioned in its place.

Next, referring to FIG. 23 , the optical touch film 600p included in the display device according to the present embodiment is mostly the same as the optical touch film 600o according to the embodiment of FIG. 22 described above, but instead of the high refractive insulating film 430M , a high refractive insulating layer 431M and a first insulating layer 430 may be positioned between the first and second touch electrodes 410 and 420 and the first connection part 412 . The high refractive insulating layer 431M may be positioned between the first insulating layer 430 and the first and second touch electrodes 410 and 420 to contact the first and second touch electrodes 410 and 420 .

Next, referring to FIG. 24 , the optical touch film 600q included in the display device according to the present embodiment is mostly the same as the optical touch film 600o according to the embodiment of FIG. 22 described above, but the display panel 300 and the An optical film 550 may be positioned between the sensor layers 400 . The adhesive layer 5 may be positioned between the optical film 550 and the display panel 300 , and the adhesive layer 10 may be positioned between the optical film 550 and the sensor layer 400 . The optical film 550 may be an isotropic film. In addition, the adhesive layer 15 may be positioned instead of the adhesive layer 10 between the optical film 500 positioned on the sensor layer 400 and the sensor layer 400 .

Next, referring to FIG. 25 , the optical touch film 600r included in the display device according to the present embodiment is mostly the same as the optical touch film 600l according to the embodiment of FIG. 19 described above, but the display panel 300 and The adhesive layer 20 may be positioned instead of the adhesive layer 10 between the separation layers 120a, and the adhesive layer 10 may be positioned instead of the adhesive layer 15 between the sensor layer 400 and the optical film 500. there is.

Next, referring to FIG. 26 , the optical touch film 600s included in the display device according to the present embodiment is mostly the same as the optical touch film 600k according to the embodiment of FIG. 18 described above, but the display panel 300 and The adhesive layer 20 may be positioned instead of the adhesive layer 10 between the separation layers 120a, and the adhesive layer 10 may be positioned instead of the adhesive layer 15 between the sensor layer 400 and the optical film 500. there is.

Next, referring to FIG. 27, the optical touch film 600t of this embodiment is mostly the same as the optical touch film 600r according to the embodiment shown in FIG. 25 described above, but the sensor layer 400 is shown in FIG. It may have the same structure as the illustrated sensor layer 400 . That is, the upper and lower positions of the first surface SA1 and the second surface SA2 may be changed. Specifically, the first connection part 412 and the first and second touch wires 411 and 421 are positioned under the separation layer 120a, and the first insulating layer 430 is positioned below it, and the first and second touch wires 411 and 421 are positioned below it. The second touch electrodes 410 and 420 may be positioned. The first and second touch wires 411 and 421 may include a first conductive layer 411a and a second conductive layer 411b, and the first conductive layer 411a is the same as the first connection part 412 . The layer may include the same material, and the second conductive layer 411b may be positioned under the first conductive layer 411a and include a low-resistance material such as a metal. A high refractive insulating layer 440M may be positioned under the first and second touch electrodes 410 and 420 . The high refractive insulating layer 440M may contact the first and second touch electrodes 410 and 420 .

Next, referring to FIG. 28 , the optical touch film 600u of this embodiment is mostly the same as the optical touch film 600t according to the embodiment shown in FIG. 27 described above, but the first and second touch electrodes 410 and 420 ), a high refractive insulating layer 441M and a second insulating layer 440 may be positioned. A high refractive insulating layer 441M may be positioned between the second insulating layer 440 and the first and second touch electrodes 410 and 420 .

Next, referring to FIG. 29, the optical touch film 600v of this embodiment is mostly the same as the optical touch film 600t according to the embodiment shown in FIG. 27 described above, but instead of the high refractive insulating film 440M, the high refractive insulating film 430M. may include The high refractive insulating layer 430M is positioned between the first connection part 412 and the first and second touch electrodes 410 and 420 and may be in contact with the first and second touch electrodes 410 and 420 .

Next, referring to FIG. 30, the optical touch film 600w of this embodiment is mostly the same as the optical touch film 600n according to the embodiment shown in FIG. 21 described above, but instead of the high refractive insulating film 450M, a high refractive insulating film 440M. may include The high refractive insulating layer 440M may be positioned under the first connection part 412 .

Next, referring to FIG. 31 , the optical touch film 600x of this embodiment is mostly the same as the optical touch film 600w according to the embodiment shown in FIG. 30 described above, but instead of the high refractive insulating film 440M, the high refractive insulating film 460M may include A second insulating layer 440 may be positioned under the first connection part 412 , and a high refractive insulating layer 460M may be positioned below it.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the right.

300: display panel
400: sensor layer
410, 420: touch electrode
411, 421: touch wiring
430, 440: insulating film
500, 550: optical film
600: optical touch film

Claims (32)

A sensor layer including a plurality of touch electrodes constituting a sensor, and a connection part that connects two adjacent touch electrodes among the plurality of touch electrodes and is positioned on a different layer from the plurality of touch electrodes;
optical film,
A curable adhesive layer positioned between the sensor layer and the optical film;
a separation layer disposed on one surface of the sensor layer and in contact with the plurality of touch electrodes and including a polymer organic material; and
a first insulating layer positioned between the plurality of touch electrodes and the connection part; and
a second insulating film positioned between the connection part and the curable adhesive layer and in contact with the connection part and the curable adhesive layer;
The refractive index of the first insulating layer is greater than the refractive index of the separation layer
optical touch film. In claim 1,
The refractive index of the first insulating film is greater than the refractive index of the second insulating film optical touch film. delete In claim 1,
The first insulating film is an optical touch film positioned between the plurality of touch electrodes and the curable adhesive layer. delete delete delete delete In claim 1,
Further comprising a third insulating film in contact with the first insulating film,
wherein the first insulating layer is positioned in a layer between the third insulating layer and the plurality of touch electrodes.
optical touch film. In claim 1,
The first insulating film is an optical touch film including an organic material. In claim 10,
The first insulating film is an optical touch film further comprising nanoparticles. delete In claim 1,
The refractive index of the first insulating film is closer to the refractive index of the plurality of touch electrodes than the refractive index of the separation layer optical touch film. In claim 1,
The refractive index of the first insulating film is 1.6 or more and 2.0 or less of the optical touch film. a display panel, and an optical touch film,
The optical touch film is
A sensor layer comprising a plurality of touch electrodes constituting the sensor;
optical film,
A curable adhesive layer positioned between the sensor layer and the optical film;
A separation layer positioned on one surface of the sensor layer and comprising a polymer organic material, and
A high refractive insulating layer positioned on a layer in contact with the plurality of touch electrodes and having a refractive index higher than that of the separation layer
including,
The separation layer is adjacent to and in contact with the curable adhesive layer,
The curable adhesive layer is located between the separation layer and the optical film.
display device. In claim 15,
The high refractive insulating layer is included in the sensor layer. 17. In claim 16,
The sensor layer further includes a connection unit that connects two adjacent touch electrodes among the plurality of touch electrodes and is positioned on a different layer from the plurality of touch electrodes,
The high refractive insulating layer is positioned between the plurality of touch electrodes and the connection part.
display device. 17. In claim 16,
The high refractive insulating layer is positioned between the plurality of touch electrodes and the curable adhesive layer. In claim 18,
The separation layer is positioned between the high refractive insulating layer and the curable adhesive layer. 17. In claim 16,
The sensor layer further includes a connection part connecting two adjacent touch electrodes among the plurality of touch electrodes and positioned on a different layer from the plurality of touch electrodes, and a first insulating layer positioned between the plurality of touch electrodes and the connection part. and,
The plurality of touch electrodes are positioned in a layer between the high refractive insulating layer and the first insulating layer.
display device. 21. In claim 20,
The connection part is in contact with the separation layer. In claim 21,
The display device in which the separation layer is positioned between the curable adhesive layer and the connection part. 21. In claim 20,
Further comprising a second insulating film in contact with the high refractive insulating film,
The high refractive insulating layer is positioned in a layer between the second insulating layer and the plurality of touch electrodes.
display device. In claim 15,
The high refractive index insulating layer includes an organic material. In claim 24,
The high refractive insulating layer further includes nanoparticles. delete In claim 15,
The display device in which the sensor layer is positioned between the display panel and the optical film. In claim 15,
A refractive index of the high refractive insulating layer is closer to a refractive index of the plurality of touch electrodes than a refractive index of the separation layer. In claim 15,
A refractive index of the high refractive insulating layer is 1.6 or more and 2.0 or less. coating a separation layer comprising a polymer organic material on a carrier substrate;
forming a sensor layer including a plurality of touch electrodes on the separation layer and a high refractive insulating film in contact with the plurality of touch electrodes and having a refractive index higher than that of the separation layer;
separating the sensor layer and the separation layer together from the carrier substrate; and
Positioning an adhesive layer between the sensor layer and the optical film and curing the adhesive layer
including,
The separation layer is adjacent to and in contact with the adhesive layer,
The adhesive layer is located between the separation layer and the optical film.
A method of manufacturing a display device. 31. In claim 30,
The high refractive index insulating layer is positioned between the plurality of touch electrodes and the adhesive layer. delete

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